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/*
* ucdebugging.cc - Debugging-related functions for usecode
*
* Copyright (C) 2002-2022 The Exult Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "ucdebugging.h"
#include "debugmsg.h"
#include "servemsg.h"
#include "stackframe.h"
#include "ucfunction.h"
#include "ucinternal.h"
Breakpoint::Breakpoint(bool once) {
this->once = once;
id = Breakpoints::getNewID();
}
AnywhereBreakpoint::AnywhereBreakpoint() : Breakpoint(true) {}
LocationBreakpoint::LocationBreakpoint(int functionid, int ip, bool once)
: Breakpoint(once) {
this->functionid = functionid;
this->ip = ip;
}
bool LocationBreakpoint::check(Stack_frame* frame) const {
return (frame->function->id == functionid)
&& (static_cast<int>(frame->ip - frame->code) == ip);
}
void LocationBreakpoint::serialize(int fd) const {
unsigned char d[13];
d[0] = static_cast<unsigned char>(Exult_server::dbg_set_location_bp);
unsigned char* dptr = &d[1];
little_endian::Write4(dptr, functionid);
little_endian::Write4(dptr, ip);
little_endian::Write4(dptr, id);
Exult_server::Send_data(fd, Exult_server::usecode_debugging, d, 13);
}
StepoverBreakpoint::StepoverBreakpoint(Stack_frame* frame) : Breakpoint(true) {
call_chain = frame->call_chain;
call_depth = frame->call_depth;
}
bool StepoverBreakpoint::check(Stack_frame* frame) const {
return (frame->call_chain == call_chain && frame->call_depth <= call_depth)
|| (frame->call_chain < call_chain);
}
FinishBreakpoint::FinishBreakpoint(Stack_frame* frame) : Breakpoint(true) {
call_chain = frame->call_chain;
call_depth = frame->call_depth;
}
bool FinishBreakpoint::check(Stack_frame* frame) const {
return (frame->call_chain == call_chain && frame->call_depth < call_depth)
|| (frame->call_chain < call_chain);
}
int Breakpoints::lastID = 0;
Breakpoints::~Breakpoints() {
// clear queue
for (auto* brk : breaks) {
delete brk;
}
}
// returns ID of a (any) breakpoint encountered, or -1 if no breakpoints
int Breakpoints::check(Stack_frame* frame) {
// check all breakpoints (always check all of them, even if match found)
// and delete the matching ones with 'once' set
// question: do we really want to delete a breakpoint (with once set)
// as soon as it is triggered? (or wait a while until it has been
// processed properly?)
// also, it might be necessary to return a list of all matching and/or
// deleted breakpoints
// OTOH, which 'once' breakpoint is hit is generally not interesting,
// and also, only one of these will be set, usually.
int breakID = -1;
for (auto*& brk : breaks) {
if (brk->check(frame)) {
breakID = brk->id;
if (brk->once) {
delete brk;
brk = nullptr;
}
}
}
breaks.remove(nullptr); // delete all nullptr from the list
return breakID;
}
void Breakpoints::add(Breakpoint* breakpoint) {
breaks.remove(breakpoint); // avoid double occurences
breaks.push_back(breakpoint);
}
void Breakpoints::remove(Breakpoint* breakpoint) {
breaks.remove(breakpoint);
}
bool Breakpoints::remove(int id) {
bool found = false;
for (auto*& brk : breaks) {
if (brk->id == id) {
found = true;
delete brk;
brk = nullptr;
}
}
breaks.remove(nullptr); // delete all nullptr from the list
return found;
}
void Breakpoints::transmit(int fd) {
for (auto* brk : breaks) {
brk->serialize(fd);
}
}
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